1 files changed, 77 insertions, 0 deletions
diff --git a/src/librbd/io/ImageDispatcher.h b/src/librbd/io/ImageDispatcher.h
new file mode 100644
index 000000000..5d5fb0535
--- /dev/null
+++ b/src/librbd/io/ImageDispatcher.h
@@ -0,0 +1,77 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_IO_IMAGE_DISPATCHER_H
+#define CEPH_LIBRBD_IO_IMAGE_DISPATCHER_H
+
+#include "include/int_types.h"
+#include "common/ceph_mutex.h"
+#include "librbd/io/Dispatcher.h"
+#include "librbd/io/ImageDispatchInterface.h"
+#include "librbd/io/ImageDispatchSpec.h"
+#include "librbd/io/ImageDispatcherInterface.h"
+#include "librbd/io/Types.h"
+#include <atomic>
+#include <map>
+
+struct Context;
+
+namespace librbd {
+
+struct ImageCtx;
+
+namespace io {
+
+template <typename> struct QosImageDispatch;
+template <typename> struct WriteBlockImageDispatch;
+
+template <typename ImageCtxT = ImageCtx>
+class ImageDispatcher : public Dispatcher<ImageCtxT, ImageDispatcherInterface> {
+public:
+  ImageDispatcher(ImageCtxT* image_ctx);
+
+  void invalidate_cache(Context* on_finish) override;
+
+  void shut_down(Context* on_finish) override;
+
+  void apply_qos_schedule_tick_min(uint64_t tick) override;
+  void apply_qos_limit(uint64_t flag, uint64_t limit, uint64_t burst,
+                       uint64_t burst_seconds) override;
+  void apply_qos_exclude_ops(uint64_t exclude_ops) override;
+
+  bool writes_blocked() const override;
+  int block_writes() override;
+  void block_writes(Context *on_blocked) override;
+
+  void unblock_writes() override;
+  void wait_on_writes_unblocked(Context *on_unblocked) override;
+
+  void remap_to_physical(Extents& image_extents, ImageArea area) override;
+  ImageArea remap_to_logical(Extents& image_extents) override;
+
+protected:
+  bool send_dispatch(
+    ImageDispatchInterface* image_dispatch,
+    ImageDispatchSpec* image_dispatch_spec) override;
+
+private:
+  struct SendVisitor;
+  struct PreprocessVisitor;
+
+  using typename Dispatcher<ImageCtxT, ImageDispatcherInterface>::C_InvalidateCache;
+
+  std::atomic<uint64_t> m_next_tid{0};
+
+  QosImageDispatch<ImageCtxT>* m_qos_image_dispatch = nullptr;
+  WriteBlockImageDispatch<ImageCtxT>* m_write_block_dispatch = nullptr;
+
+  bool preprocess(ImageDispatchSpec* image_dispatch_spec);
+
+};
+
+} // namespace io
+} // namespace librbd
+
+extern template class librbd::io::ImageDispatcher<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_IO_IMAGE_DISPATCHER_H